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Authors
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Funding
Funding for this research was provided by:
the Science Foundation of Capital Medicine Development (2014-2-2171)
Capital Foundation for Clinical Characteristic Applied Research Projects (Z141107002514132)
Capital Foundation for Clinical Characteristic Applied Research Projects (Z181100001718084)
The Digestive Medical Coordinated Development Center of Beijing Municipal Administration of Hospitals (XXZ0404)
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Article History
Received: 2 December 2019
Accepted: 27 May 2020
First Online: 5 June 2020
Compliance with ethical standards
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: I confirm that the information reported above are accurate and Drs. Hong-shan Wei, Li Jiang, Jia-li Ma, Ling-ling He and Ping Li have no conflicts of interest or financial ties to disclose. All of the authors (Jia-li Ma, Ling-ling He, Ping Li, Li Jiang, and Hong-shan Wei) declare no conflicts of interest with regard to the content of this study.
: This retrospective study was approved by the Clinical Ethics Committees of Beijing Ditan Hospital, Capital Medical University (JDLKZ2018-021–01). All patients provided written informed consent in accordance with the Declaration of Helsinki.
